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EMBRYOLOGY EXAM II FORM A MARCH 3, 2003 1. The third pharyngeal arch cartilages give rise to which of the following? A. stylohyoid ligament B. thyroid cartilage C. styloid process D. sphenomandibular ligament E. greater horns of the hyoid bone 2. Which of the following structures is not related to the first pharyngeal arch? A. malleus B. facial nerve C. Meckel’s cartilage D. mandibular prominence E. maxillary prominence 3. Which of the following structures is not derived from the second pharyngeal arch cartilage? A. incus B. stapes C. styloid process D. lesser horn of the hyoid bone E. superior part of the hyoid bone 4. The nasolacrimal duct develops in a groove between the maxillary and lateral nasal prominences. A. true B. false 5. The cartilages of the larynx are derived mainly from the cartilages of which of the following pharyngeal arches? A. second and third B. third and fourth C. third, fourth, and fifth D. fourth and sixth E. fourth and fifth 6. Which of the following cranial nerves supplies muscles derived from the first pair of pharyngeal arches? A. vagus B. glossopharyngeal C. facial D. trigeminal E. optic embryology exam II, form A, page 1, questions 1-6 7. Which of the following structures is derived from the fourth pair of pharyngeal pouches? A. thymus B. superior parathyroid glands C. inferior parathyroid glands D. thyroid gland 8. Unilateral cleft lip results from failure of the medial nasal prominences to fuse with each other. A. true B. false 9. The major portion of the palate develops from the: A. lateral palatine processes B. median palatine process C. intermaxillary segment D. medial nasal prominences E. frontonasal prominence 10. In DeGeorge syndrome, the development of the thymus and parathyroid glands are affected. Which of the following is involved? A. first pharyngeal pouch B. second pharyngeal pouch C. third pharyngeal pouch D. second and fourth pharyngeal pouches 11. When the palatine processes fail to meet and fuse with each other and with the nasal septum, the resulting anomaly is a cleft of the: A. primary palate B. secondary palate C. intermaxillary segment D. A and B E. A, B, and C 12. The intermaxillary segment of the upper jaw is formed when the maxillary prominences fuse with one another. A. true B. false 13. The external acoustic meatus develops from the: A. first pharyngeal groove B. second pharyngeal groove C. first pharyngeal pouch D. second pharyngeal pouch E. first pharyngeal groove and pouch 14. Primary cleft palate is due to the absence of lateral palatine shelves. A. true B. false embryology exam II, form A, page 2, questions 7-14 15. Which of the following structures is derived from surface ectoderm? A. choroid B. bony labyrinth C. extrinsic eye muscles D. membranous labyrinth E. sclera 16. Structures derived from surface ectoderm include: A. lens B. otic vesicle C. external acoustic meatus D. A and B E. A, B, and C 17. The choroid is derived from the mesenchyme between the sclera and pigmented layer of the retina. A. true B. false 18. The otic vesicle gives rise to the: A. saccule B. utricle C. both D. neither 19. Coloboma iridis is caused by: A. disturbance in the development of the lower eyelid B. defective closure of the choroids fissure C. both D. neither 20. The cochlear duct: A. contains the organ of Corti B. is derived from surface ectoderm C. both D. neither 21. The auricle of the external ear is innervated by cranial nerves: A. V B. VII C. both D. neither embryology exam II, form A, page 3, questions 15-21 22. The optic cup: A. develops from the optic vesicle B. gives rise to the pigment layer of the retina C. gives rise to the neural layer of the retina D. A and B E. A, B, and C 23. Taste sensation from the oral part of the tongue is carried by a branch of cranial nerve: A. V B. VII C. IX D. X MATCH THE FOLLOWING. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 24. incus A. B. C. D. E. AB. arch I arch II arch III arch IV arch VI none of the above 25. muscles of facial expression 26. recurrent laryngeal nerve 27. glossopharyngeal nerve 28. inferior parathyroid gland 29. mandible 30. constrictor muscles of the pharynx 31. thyroid gland 32. greater horn of the hyoid 33. lower lip 34. Structures of the nose are derived from: A. pharyngeal arch I B. pharyngeal arch II C. both D. neither 35. The frontonasal prominence gives rise to the: A. intermaxillary segment B. maxillary prominence C. both D. neither embryology exam II, form A, page 4, questions 22-35 36. The lips are derived from the: A. frontonasal prominence B. arch I C. both D. neither 37. The intermaxillary segment forms by fusion of the: A. medial nasal prominences B. lateral nasal prominences C. maxillary prominences D. A and B E. A, B, and C 38. The fifth pharyngeal arch does not contribute any cellular components to the adult body. A. true B. false MATCH THE FOLLOWING. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 39. palatine tonsil A. B. C. D. E. AB. pouch 1 pouch 2 pouch 3 pouch 4 pouch 5 none of the above 40. tubotympanic recess 41. thyroid follicles 42. superior parathyroid glands 43. Pierre Robin syndrome 44. eustacian tube 45. thymus 46. Rubella infection during the second month of development can result to damage to the: A. eye B. ear C. both D. neither 47. Treacher Collins syndrome is associated with abnormal development of: A. pouch 3 B. arch 3 C. both D. neither embryology exam II, form A, page 5, questions 36-47 48. Disruption of the formation of arch I can result in deformity of the external ear. A. true B. false 49. The stomodeum forms at the site of the buccopharyngeal membrane. A. true B. false 50. During the closure of the school due to weather you: A. studied B. watched television C. both D. neither END OF EXAM embryology exam II, form A, page 6, questions 48-50